Asymmetric electrode system



March 1,1938. J. H. D BOER ET AL 2,109,379

ASYMMETRIC E EEEEEEEEEEEE EM Filed Dec 30] 193 INVENTORS N H NDRIK DEBOERun mm CHRISTIAAN VAN GEEL 2 aioaevo aware and have also indicatedonly one specific application for which our invention may be employed,it will be apparent that our invention is by no means limited to theexact forms illustrated coating between said metal .suppqrt and saidselenium layer.

2. An electrode system having unsymmetrical conductivity and comprisinga copper support and a selenium layer, and an intermediate anticorrosivecoating and a carbon coating between said selenium layer and said coppersupport.

3. An electrode system having unsymmetrical conductivity and comprisingan aluminum base, an anti-corrosive coating on said aluminum base, alayer of carbon on said anti-corrosive coating and a selenium layer onsaid carbon coating.

4. An electrode system having unsymmetrical conductivity and comprisingan aluminum base, successive layers of nickel, carbon and selenium onsaid base.

5. An electrode system having unsymmetrical conductivity and comprisingan aluminum base and successive layers of nickel, chromium, car- 'bonand selenium.

6. An electrode system having unsymmetrical conductivity and comprisingan aluminum base and successive layers of nickel, chromium, carbon andselenium, and an insulating coating on said selenium.

JAN HENDRIK DE BOER. WIILEM CHRISTIAAN VAN GEEL.

